CX28398 Conexant Systems, CX28398 Datasheet - Page 173

• Manufacturer Part Number: CX28398
• Description: (CX28394 - CX28398) Quad/x16/Octal?T1/E1/J1 Framers
• Manufacturer: Conexant Systems

CX28394/28395/28398
Quad/x16/Octal—T1/E1/J1 Framers
BERR[11:8]
Reading AERR clears the SEF[1:0], COFA[1:0] and FRED[3:0] count values.
FRED[3:0]
COFA[1:0]
SEF[1:0]
100054E
059—PRBS Bit Error Counter MSB (BERR)
05A—SEF/FRED/COFA Alarm Counter (AERR)
FRED[3]
15
0
7
BERR Count (suspended if BSTART = 0)
Receive loss of basic frame alignment count—Increments for each occurrence of FRED
[ALM3; addr 049]. The four bit count is large enough to count more than 100 ms worth of
MFAS timeout intervals (8 ms each) during E1 modes. Processor may therefore use FRED
counter overflow interrupt to indicate that a receive MFAS alignment search has timed out.
Change of Frame Alignment Count—Increments each time the offline framer generates a
reframe pulse that aligns the receiver timebase to a new bit position.
Severely Errored Frame Count—Increments for each occurrence of SEF [ALM3; addr 049].
FRED[2]
14
0
6
FRED[1]
13
0
5
FRED[0]
12
0
4
Conexant
BERR[11]
COFA[1]
11
3
BERR[10]
COFA[0]
10
2
3.10 Performance Monitoring Registers
BERR[9]
SEF[1]
9
1
3.0 Registers
BERR[8]
SEF[0]
8
0
3-51